import java.util.Scanner;
class Solution {
    public boolean isSame(TreeNode q, TreeNode p){
        if(q == null || p == null){
            return q == p;
        }
        return q.val == p.val && isSame(q.left, p.left) && isSame(q.right, p.right);
    }
    public boolean isSubtree(TreeNode root, TreeNode subRoot) {
        if(root == null){
            return false;
        }
        if(isSame(root, subRoot)){
            return true;
        }
        if(isSubtree(root.left, subRoot) || isSubtree(root.right, subRoot)){
            return true;
        }
        return false;
    }
}
class TreeNode{
    char val;
    TreeNode left;
    TreeNode right;
    public TreeNode(){}
    public TreeNode(char val){
        this.val = val;
    }
}
// 注意类名必须为 Main, 不要有任何 package xxx 信息
class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            String str = in.nextLine();

            TreeNode root = createTree(str);

            inOrder(root);
        }
    }
    public static int i = 0;
    public static TreeNode createTree(String str){
        TreeNode root = null;
        if(str.charAt(i) != '#'){
            root = new TreeNode(str.charAt(i++));
            root.left = createTree(str);
            root.right = createTree(str);
        }else{
            i++;
        }
        return root;
    }

    public static void inOrder(TreeNode root){
        if(root == null){
            return ;
        }
        inOrder(root.left);
        System.out.print(root.val + " ");
        inOrder(root.right);
    }
}
public class Test {
}
